<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>样式演示</title>
    <style>
        /*背景图片重复  no-repeat：不重复  repeat-x：水平重复  repeat-y：垂直重复   repeat：水平+垂直重复*/
        body{
            background: url("../../img/bg.jpg");
            /*background-repeat: repeat ;*/
        }
        input{
            /*outline: none;*/
        }

        div{
            display: none;
            width: 100px;
        }
    </style>
</head>
<body>
用户名：<input type="text" />
<div>春季</div>
<div>夏季</div>
<div>秋季</div>
<div>冬季</div>

</body>
</html>